1040285881 has 4 divisors (see below), whose sum is σ = 1040361700. Its totient is φ = 1040210064.

The previous prime is 1040285801. The next prime is 1040285923. The reversal of 1040285881 is 1885820401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 677040400 + 363245481 = 26020^2 + 19059^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040285881 is a prime.

It is a super-2 number, since 2×1040285881² = 2164389428415892322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1040285881.

It is not an unprimeable number, because it can be changed into a prime (1040285801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10926 + ... + 46903.

It is an arithmetic number, because the mean of its divisors is an integer number (260090425).

Almost surely, 2^1040285881 is an apocalyptic number.

It is an amenable number.

1040285881 is a deficient number, since it is larger than the sum of its proper divisors (75819).

1040285881 is an equidigital number, since it uses as much as digits as its factorization.

1040285881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75818.

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 1040285881 is about 32253.4630853805. The cubic root of 1040285881 is about 1013.2522296176.

The spelling of 1040285881 in words is "one billion, forty million, two hundred eighty-five thousand, eight hundred eighty-one".